Hexadecimal to Decimal Converter

Hexadecimal is the base-16 number system, using digits 0–9 and letters A–F. Each hex digit maps exactly to 4 binary bits (a nibble), so two hex digits represent a full byte. This makes hex the standard way to write memory addresses, color codes, and hashes compactly.

Decimal is the base-10 number system used in everyday counting, built from the digits 0–9. It's the format humans read and reason about naturally, which is why programmers convert binary, octal, and hexadecimal values back to decimal whenever they need a human-readable number.

To convert hexadecimal to decimal, multiply each digit's value (A–F count as 10–15) by its positional power of 16 (starting from 1 on the right) and add the results. For example, hex A = 10 in decimal. The same method turns CA into (12×16)+(10×1) = 202.